This diagram from a 1967 documentation shows how to switch high voltage neon lamps with 5V TTL outputs. The circuit can be adapted to function as a shield.
This circuit was suggested by Philips in 1967 documentation. The circuit receives modulated light and has...
This circuit generates sequence of pulses in order and times determined by the capacitors in pins...
We found this circuit in a 1979 French publication, but it can still be assembled today with...